Advanced System care is an extremely good program. I use it a couple times a week and it keeps my computer running like new.
I tried it out on an old xp laptop (about 6 years old which was running really slow) and it made it a lot faster. The most important thing is registry fix. And do a disk defragment once a week or once a fortnight and it will keep your computer running smoothly. Plus the more often you do it, the faster it will fix all the problems. Keep using it, it is the best program to keep upkeep your computer.
Maybe you are getting spyware issues because you have malware or a virus. Scan your computere with Malwarebytes anti-malware see if it finds anything.
Most of the spyware things it looks for are cookies and stuff which usually are harmless to your computer. But there can be some cookies which lead to viruses.